Type-writing machine.



A H. P. FRAENZL.

TYPE WRITING MACHINE.

APPLICATION FILED ocr. 1911.

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TYPE WRITING MACHINE.

APPLICATION FILED ocr.\.1911.

Patented Sapt. 10, 1918.

2 SHEETS-SHEET 2.

Shmwtoz nism for shifting the carriage of a typ'e.

made upon the typewriter for it.

sra rns -arnnrorrin.

HUBERT P. FRAEN'ZL, or TACOMA, WASHINGTON.

TYPE-WRITING MACHINE.

Specification of Letters Patent. 'Patented Sept. 10, 1918.

Application field October 1, 1917. Serial No. 194,233.

make and use the same.

This invention relates generally to typewriting machines, and more particularly to certain new and useful improvements in car riage return mechanism.

The primary object of the invention is to provide a new and improved electric mechawriter and operating or turning the platen, said mechanism being controlled bya single electric switch which includes an actuating member in the form of a key similar to the other keys of the typewriter and disposed adjacent the same.

Another object of the invention is to provide an automatic cut-off switch disposed in the circuit of the electric carriage shift and line 'spacing mechanism of a typewriter, said switch being actuated by the carriage as the same approaches the limit of its movement to open the circuit of the mechanism, and thereby prevent the waste of electric energy and probable injury to the device should the operator maintain the controlling switch in closed position after the carriage has reached its limit. Incidentally, the automatic out off switch provides a means for arresting themovement of the typewriter carriage.

Another object of the invention is to provide a device of this character which can be readily and easily attached to typewriters now in use without any special alteration A further object is to greatly improve upon devices of this character by the provision of a comparatively simple, strong,- durable and inexpensive construction, one which will be eflicient and reliable in operation and well adapted to the purpose for which it is designed.

With these and numerous other objects in View, the invention consists of certain novel features of construction, and the com-' HUBERT P. FRAEN ZL,

' extend screws bination and arrangement of parts as will be herein fully described and claimed.

In the accompanying drawing, forming a part of the appllcation, and in which similar reference characters are used to designate like parts throughout the several views.

Figure -1"is a-perspective view of a well known form' of typewriter, showing the device constructed in accordance with this in vention, applied thereto.

Fig. 2 is a perspective view of the various parts of the device disconnected from the typewriter and from themselvesand being arranged ready to-be assembled. Figs. 3 and 4 are central vertical sectional views through the casings of. I the two switches showingjmore "in detail the con struction of these switches and, i

Fig. 5 is a diagrammatic view illustrating the manner in which the variousuparts of the device are electrically arranged in a circuit. v I

In the embodiment illustrated, a well known make of typewriter is shown, and the carriage is shifted to the left by well known means, such, for instance, as the springdrawn ta e or flexible element X shown in Fig. 1. 'Fo the rear part and upper side. of the frame of thetypewriter is ren'iovably secured a plate 1, said plate extending longitudinally of the typewriter, being disposed in a horizontal plane, and being provided with a pair of longitudinally spaced upstanding brackets 2. Disposed between these brackets 2 and secured thereto in any suitable manner is a solenoid 8; The solenoid 3 is provided with a centrhl bore through which slidesa soft iron or other suitable core 4, one end of which always projects out of the bore of the solenoid and has rigidly .secured thereto one end of an arm 5. The other end of the arm 5 is rigidly secured to the upturned end 6 of a bar 7.

The bar 7 is provided with a pair of longitudinally extending slots 8 through which 9, the threaded ends of which are anchored to a-portion of the mechanism carried by the carriage a of the typewriter. By this construction, the .bar 7 is connected to the back of the carriage of the typewriter and has a limited longitudinal movement with respect to the same, 5 I v f Fixed to a stationary part,-preferably a portion 6, of the frame ofthe carriage a and extending upwardly from thesame is a screwior pivot 9", whichforms the fulcrum of alever. 10, said fulcrum being disposed intermediateof the ends of .the lever. As clearly shown by the drawings, the lever extends transversely of the path of move ment of the carriage a: andjhas its rear end disposed in the path ofthe'upturned end 6 of the bar 7-s'o as to be engaged by said up-- I turned end 6 when said bar is shifted toward the right in .themanner to be hereinafter described. The other end, that is, the forward end .of the lever 10 is provided .withturns the platen roller .8.

r In order to actuate-the mechanism just described, a =uitable switch 14 is provided.

This switch may be of any convenient construction, but is preferablymade compact and inclosed in a small housing or casing 15.

2 which can be readily and easily attached to the frame of the typewriter. Themovable member of the switch 14: is carried by a key 16 said key being somewhat similar to the V keys 7 of the typewriter and being disposed '35 adjacent the same so that the operator of the typewriter does not have to move his hands away from the keyboard when operat-' ing the carriage shiftand line spacing mechanism.

Secured to the left side of the frame of the typewriter in any suitable manner is another small casing 17 in which is housed another switch 18. The movable part of this switch 18 is preferably carried by a plunger 19 and normally held in closed position by a coil spring 20. The plunger 19 has its upper free end connected to the lower end of a link 21. 7

link 21 is connected to one of the arms of a -be'll crank 22, the latter being pivoted to a supporting plate 23 secured to the "frame of the typewriter, and the' belhcrank 22 has its other arm connected to a rod'24. This rod 24 extends longitudinally over a portion of the front of the typewriter, adjacent the. carriage. thereof, and is held in a horizontal and this portion 26 is disposed in the path of a lug 27 carried by the marginal stop g disposed at the left hand side of the car- 66 riage. By this construction, whenever the The upper-end of the carriage approaches the limit of its movement toward the right, the stop 27 engages the upturned end 26of the rod 24, and through themedium of the bell crank 22a'nd link 21, it opens the switch 18.

The switches 14' and 1S and the solenoid 3 are arranged in series by means of suitable conductors which may be run to the parts to which they are connected without interfering with the various mechanisms of the typewriter. Although the currentfor operating this" circuit may be supplied from disposed at the limit of its movement to- .Ward the left, and it is desired to shift thecarriage so as to start a new line it is only necessary to .depress the key 16. This closes the switch 14 ,and energizes the solenoid 3, the latter thereby drawing its core 4 into its central bore and simultaneously moving the bar 7 toward the right. As the bar 7 begins its movement, the upturned end 6 thereof engages the lever 10 and rocks the same on the fulcrum 9 so as vto rock the bell crank 13 and actuate the line spacing mechanism to turn the platen rollerc. \Vhile this isv taking place, the solenoid core 4: and the bar 7 are continuing their movement toward the right, and when the bar 7 is moved with respect to the carriage at until. the screws 9 engage the ends of the slots 8, the bar 7 will begin to move the entire carriage toward the right. It is obvious, therefore, that the length'of the solenoid is greater than that of the maximum movement of the carriage; for its length is suilicient to effect the rotation of the platen, :by its initial movement,

the upturned end 26 of the rod 24 and moves said rod toward the right. This movement as hereinbefore explained opens the switch 18 and breaks the circuit through the solenoid. Thus a means for arresting the movement of the carriage is provided. In ad dition to this function, the switch 18 pro vides for the economical use of electricity,

as y no current would be used or wasted should the'operator of the typewriter keep the key 16 depressed after the carriage reaches this point. A still further function of the switch mechanism 17 is to provide a ice switches at will of an operator, and means.

mechanism to its normal position.

cushion or'shock absorbing meansfor the arriage; forit is obvious that the spring 20, which normally holds this switch closed, al o yicldingly resists movement of the elelfi'ltwIltS 19,21 to 24, 26 and 27; thereby yieldingly resisting movement of the carriage. In the line spacing mechanism of the typewriter there is usually disposed a small ordinary spring (not shown) which returns this This spring will soon as the carriage or is shifted toward the left one or two spaces, return the lever 10, bar 7, arm 5, and solenoid plunger i to their normal-positions. Should this spring which is common in all typewriters become weak, or should the friction.

of the various parts of the devi'ce become so great that this spring will not actuate them, then a small auxiliary coil. spring 29 is used. This coil spring 99 has one of its ends an.- chored to one of the screws 9 while its other end is connected to the bar 7 in any suitable manner.

"From the foregoing description taken in connection with the accompanying drawings, the construction, ,use and operation of the device will be readily understood without a more extended explanation. It will be seen that the objects of the invention have"- been effectively carried out, as a very simple and cheaply constructed electric carriage shifting and line spacing attachment for typewriters now in use has been provided.

it is obvious that numerous changes in form, proportion and in the minor details construction may be resorted to without departing from the spirit of this invention, and hence it is to be understood that I do not w wish to be limited to the exact construction herein shown and described other than asclaimed.

I claim 1. In a typewriter comprising a track, and a carriage operable for movement along the track in the direction for letter-spacing;

,the combination of anelectric circuit .1n-

eluding a solenoid and two switches, means operable by the solenoid for shifting the carriage in the direction opposite to the first said direction, means for manually effecting the closing and opening of one of said operable by movement of the carriage for opening the other of said switches.

2-. in a typewriter comprising a track, and carriage operable for movement along the track in the direction for letter-spacing, the combination of an electric circuit includ in a solenoid. and two switches, means operable by the solenoid for shifting the carriage in the direction opposite to the first said direction, means formanually effecting the closing and opening "of one of said switches at will of an operator, means operable by movement of the carriage for opening the other of said switches, resilient means for yieldingly holding the latter of the said switches normally closed and for cushioning the shock of the carriage at the end of its movement in said opposite direction.

3. In a typewriter comprising a track, and a carriage operable for movement along the track in the direction for letter-spacing; the combination of an electric circuit including a. solenoid and a switch. the solenoid being of greater length than the length of the maximum sweep of the carriage along'its track, the solenoid being substantially level with the carriage and supported in the rear of the latter, an element on said carriage extending. substantially" horizontally toward said solenoid, and an element extending substantially horizontally from the core of said solenoid toward said carriage and being cooperative with the first said element for effecting movement of said carriage along said track.

d. The combination with a typewriter, of a solenoid fixed thereto, a movable core for said solenoid, a bar slida'bly mounted upon the carriage of the typewriter, means rigidly connecting said bar with said core to move crumed intermediate of its ends to the frame of the carriage of thr tvpewriter and hav ing one of its ends positioned to be engaged and actuated by said bar, a link connecting the other end of said last mentioned lever and'said bell crank to actuate the line spacing mechanism simultaneously with the shifting of the carriage of the typewriter, and means for operating said solenoid.

5. In a typewriter comprising a track, and a carriage operable for movement along the track in the direction for letter-spacing; the combination of an electric circuit including a solenoid and a switch, a bar mounted to move independently with relation to said carriage in its own longitudinal direction, means for guiding said bar longitudinally and rectilinearly and for effecting movement of the carriage with said bar at the end of the independent movement of the bar, means connecting said solenoid to said bar so as to effect movement of the latter in its longitudinal direction, mechanism controlled by said independent movement of said bar, and means for manually opening and closing the switch at will of an operator.

6. In a typewriter comprising a track, a carriage operable for movement along said track in the direction for letter spacing, and a platen carried by said carriage; the com bination of a bar mounted on said carriage and adapted to have independent movement with relation to the carriage and being operable to effect movement of the carr1ag e, means for moving said bar rect1l1nearly 1n the direction opposite to said letter-spacing with the latter, a bell crank fixed to the line direction, and means whereby the independent movement of the bar effects rotary movement of said platen.

7. In a typewriter comprising a track, a carriage operable for movement along said track in the direction for letter spacing, and a platen carried by said carriage; the combination of a barmounted on said carriage and adapted to have independent movement with relation to the carriage and being operable to elfect movement of the carriage, a

solenoid having its core rigidly united with said bar and operable to effectrect-ilinear movement of the latter in the direction opposite to said letter-spacing direction, and means whereby the independent movement of the said bar efi'ects rotary movement of said platen. i

8. In a typewriter comprising a track, a carriage operable for movement along said track in the direction for letter spacing, and a platen carried by said carriage; the combination of a bar mounted on said carriage and adapted to have independent movement with relation to the carriage and being'operable to effect movement of the carriage, means for moving said bar rectilinearly in the direction opposite tosaid letter-spacing direction, a lever pivotally mounted on one end of the carriage and extending from front to rear and being operable by said independent movement of the bar, and meanscoiiperative with said lever for effecting rotation of said platen.

9. In a typewriter comprising a track, a carriage operable for movement along said. track in the direction for letter spacing, and a platen carried by said carriage; the combination of a bar mounted on said carriage and adapted to have independent movement with relation to the carriage and being operable to effect movement of the carriage, means for moving said bar rectilinearly in the direction opposite to said letter-spacing direction, a' solenoid supported parallel with the said bar and having one end rigidly connected to the corresponding end of said bar,

and means for energizing said solenoid and thereby eii'ecting longitudinal movement of said core and bar.

10. In a typewriter, the combination of track, and a carriage, operable for movement along the track in the direction for letterspacing; the combination of a bar mounted on said carriage and adapted to have independent movement from its normal position with relation to the carriage and being operable to effect movement of said carriage in the direction opposite to said letter-spacing direction, and means for returning the said bar to said normal position with relation to said carriage and for yieldingly retaining said bar in said normal position.

11. The combination of a carriage, a bar on said carriage and movable therewith and with relation thereto, means on said carriage for limiting movement of said bar with relation to said carriage, a solenoid, means rigidly connecting said solenoid to said bar, means to energize said solenoid and thereby cause its core to move said bar from its normal position relative to said carriage, and means for yieldingly detaining said barin its normal position and for returning said bar to said normal'position and thereby returning said solenoid to its normal position.

.12. The combination of a carriage, a solenoid for moving the carriage through apredetermined stroke, electrical conductors in circuit with said solenoid, a normally open electric switch, manually operable means for closing said switch so as to energize said HUBERT P. FBAENZL. Witnesses:

GEORGE R. Moore,- A. G. Larrnv. 

